If HTML is good enough:

https://www.arxiv-vanity.com/

Arxiv Vanity renders academic papers from Arxiv as responsive web pages so you don’t have to squint at a PDF.

Thanks for the link, this will prove useful given the amount of Arxiv links on HN.

Doesn't appear to work with this paper, though.

There's a free document converter available here: http://sensusaccess.com/convert-a-file